net: neterion: replace ip_fast_csum with csum_replace2

replace ip_fast_csum with csum_replace2 to save cpu cycles

Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/net/ethernet/neterion/s2io.c b/drivers/net/ethernet/neterion/s2io.c
index bfd887382e19..3371ff41bb34 100644
--- a/drivers/net/ethernet/neterion/s2io.c
+++ b/drivers/net/ethernet/neterion/s2io.c
@@ -80,6 +80,7 @@
 #include <linux/slab.h>
 #include <linux/prefetch.h>
 #include <net/tcp.h>
+#include <net/checksum.h>
 
 #include <asm/div64.h>
 #include <asm/irq.h>
@@ -8337,16 +8338,13 @@ static void update_L3L4_header(struct s2io_nic *sp, struct lro *lro)
 {
         struct iphdr *ip = lro->iph;
         struct tcphdr *tcp = lro->tcph;
-        __sum16 nchk;
         struct swStat *swstats = &sp->mac_control.stats_info->sw_stat;
 
         DBG_PRINT(INFO_DBG, "%s: Been here...\n", __func__);
 
         /* Update L3 header */
+        csum_replace2(&ip->check, ip->tot_len, htons(lro->total_len));
         ip->tot_len = htons(lro->total_len);
-        ip->check = 0;
-        nchk = ip_fast_csum((u8 *)lro->iph, ip->ihl);
-        ip->check = nchk;
 
         /* Update L4 header */
         tcp->ack_seq = lro->tcp_ack;